EP1500281A2 - Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur - Google Patents

Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur

Info

Publication number
EP1500281A2
EP1500281A2 EP03725142A EP03725142A EP1500281A2 EP 1500281 A2 EP1500281 A2 EP 1500281A2 EP 03725142 A EP03725142 A EP 03725142A EP 03725142 A EP03725142 A EP 03725142A EP 1500281 A2 EP1500281 A2 EP 1500281A2
Authority
EP
European Patent Office
Prior art keywords
block
significant
coefficients
transformation coefficients
coding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03725142A
Other languages
German (de)
English (en)
Inventor
Heiko Schwarz
Detlef Marpe
Thomas Wiegand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=29285282&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1500281(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority to EP04020471A priority Critical patent/EP1487113B1/fr
Priority to EP04016773A priority patent/EP1467491B1/fr
Publication of EP1500281A2 publication Critical patent/EP1500281A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/4006—Conversion to or from arithmetic code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/129—Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/18—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a set of transform coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/93—Run-length coding

Definitions

  • decoders as well as a corresponding computer program and a corresponding computer-readable storage medium
  • the present invention describes a method and an arrangement for coding transformation coefficients in image and / or video encoders and decoders, as well as a corresponding computer program and a corresponding computer-readable storage medium, which in particular as a new efficient method for binary arithmetic coding of transformation coefficients in the field of video coding (CABAC in H.264 / AVC, see [1]).
  • the blocks of quantized transformation coefficients (levels) are identified by a defined scan process mapped a vector which is encoded by using a run length coding and a subsequent mapping to code words of variable length.
  • variable length code words are assigned to two-dimensional events (RUN, LEVEL), where LEVEL represents the quantized value of a (significant) transformation coefficient that is not quantized to zero; the run length RUN indicates the number of successive, zero-quantified (non-significant) transformation coefficients which lie in the vector of transformation coefficients immediately before the current significant transformation coefficient.
  • variable length code words are defined for the two special events EOB and ESCAPE. While, the EOB event indicates that none If there are further significant transformation coefficients in the block, the ESCAPE event signals that the existing event (RUN, LEVEL) cannot be represented by the defined alphabet of code words of variable length. In this case, the symbols RUN and LEVEL are coded by code words of fixed length.
  • code words of variable length are assigned on the basis of 3-dimensional events (LAST, RUN, LEVEL), with the binary symbol LAST indicating whether the current significant transform coefficient is the last significant coefficient within the block, or if there are other significant transform coefficients to follow.
  • 3-dimensional events LAST, RUN, LEVEL
  • ESCAPE event is used analogously to MPEG-2, whereby the binary symbol LAST is encoded in addition to RUN and LEVEL.
  • the coding of the transformation coefficients implemented in MPEG-2, H.263 and MPEG-4 has the following disadvantages: Only one code word of integer length can be assigned to each coding event, and there is no efficient coding of events with probabilities greater than 0.5. - The use of a fixed table for mapping the coding events onto the code words of variable length for all transformation coefficients within a block does not take into account the position or frequency-dependent symbol statistics.
  • Annex E of the H.263 standard specifies an optional, non-adaptive arithmetic coding, in which different, predefined model probability distributions are used - one for the first, second and third event (LAST, RUN, LEVEL) / ESCAPE another for all subsequent events (LAST, RUN, LEVEL) / ESCAPE of a block of transformation coefficients, - as well as another one for the symbols LAST, RUN and LEVEL, which are coded after an ESCAPE event.
  • This optional arithmetic coding does not significantly increase the coding efficiency for the following reasons: -
  • the advantage of arithmetic coding that a coding event can be assigned a code word of non-integer length has the form ( LAST, RUN, LEVEL) hardly affect coding efficiency.
  • the advantage of using different probability distributions is eliminated in that no adaptation to the actually existing symbol statistics is possible.
  • H.264 / AVC specifies a context-adaptive method based on variable length code words for the coding of transformation coefficients as the standard method for entropy coding.
  • the coding of a block of transformation coefficients is determined by the following features: -
  • the COEFF_TOKEN symbol determines both the number of significant coefficients within a block and the number of consecutive coefficients quantized to one at the end of the vector of transformation coefficients.
  • one of five defined code word tables is selected for the coding.
  • the coding of the values (levels) of the remaining significant transformation coefficients takes place in reverse scan order by means of a combined prefix-suffix code word. If the number of significant transformation coefficients is smaller than the number of transformation coefficients for the corresponding block, a symbol TOTAL_ZEROS is encoded, which represents the number of transformation coefficients quantized to zero, which lie before the last significant coefficient in the coefficient vector, indicates. Eighteen code word tables were specified for this, which are switched depending on the number of significant coefficients and the block type.
  • a possible solution to avoid the disadvantages of the known methods for coding transformation coefficients in block-based image and video encoders is a combination of adaptive arithmetic coding and a suitable context formation for utilizing the inter-symbol redundancies
  • the increased computing effort of arithmetic coding compared to coding using code words of variable length is a disadvantage, in particular the possibility of efficient hardware and software implementation must be taken into account.
  • the object of the invention is therefore a
  • Video encoders and decoders and a corresponding one To provide a computer program and a corresponding computer-readable storage medium which remedy the abovementioned shortcomings and in particular keep the computing effort required for coding low.
  • a particular advantage of the method according to the invention is that for blocks of (video) images containing significant transformation coefficients, the transformation coefficients are coded such that the positions of significant transformation coefficients in the block for each block in a scan Block and then in reverse scan order - starting with the last significant transformation coefficient within the block - the values (levels) of the significant transformation coefficients are determined and encoded.
  • a preferred embodiment of the method according to the invention is characterized in that each significant transformation coefficient of the block that differs from the last transformation coefficient of the block is identified by a one-bit symbol.
  • a particular advantage of the method is that by transmitting a one-bit symbol SIG for each coefficient of a block and a one-bit symbol LAST for each significant coefficient of a block, a significance map is encoded, the transmission in scan - Order is made, SIG is used to identify significant coefficients and LAST indicates whether there are other significant transformation coefficients in the block.
  • Another preferred embodiment of the method according to the invention provides that the modeling for the one-bit symbol CBP4, for the coding of the significance mapping and / or for the coding of the coefficient amounts takes place in a context-dependent manner. It is provided that block types of transformation coefficients are combined with comparable statistics to block categories.
  • the amount (ABS) is indicated by a symbol in unary binarization or by a symbol having a prefix part and a suffix part, the prefix part consisting of ones and the suffix Part is coded in a 0 th order Exp Golomb code.
  • An arrangement for coding transformation coefficients in image and / or video encoders and decoders is advantageously set up in such a way that it comprises at least one processor and / or chip which is (are) set up in such a way that coding of transformations -Coefficients can be carried out, with blocks of (video) images containing significant transformation coefficients, the transformation coefficients being coded such that the positions of significant transformation coefficients in the block and subsequently in Reverse scan order - starting with the last significant transformation coefficient within the block - the values (levels) of the significant transformation coefficients are determined and encoded.
  • a computer program for coding transformation coefficients in image and / or video encoders and decoders is distinguished in that it enables a computer, after it has been loaded into the memory of the computer, to encode transformation coefficients, whereby significant ones Blocks of (video) images containing transformation coefficients the transformation coefficients are encoded in such a way that for each block in a scan the positions of significant transformation coefficients in the block and then in reverse scan order - starting with the last significant transformation coefficients within the block - the values (levels) of the significant transformation coefficients are determined and encoded.
  • Such computer programs (for a fee or free of charge, freely accessible or password-protected) can be made available for download in a data or communication network.
  • the computer programs provided in this way can then be used by a method in which a computer program according to claim 11 is downloaded from a network for data transmission, for example from the Internet, to a data processing device connected to the network.
  • a computer-readable storage medium is advantageously used, on which a program is stored, which enables a computer after it has been loaded into the memory of the computer, a method for encoding transformation coefficients in image - and / or video coders and decoders, wherein blocks of (video) images containing significant transformation coefficients are encoded for the transformation coefficients such that the positions of significant transformation coefficients in for each block in a scan the block and then in reverse scan order - starting with the last significant transformation coefficient within the block - the values (levels) of the significant transformation coefficients are determined and encoded.
  • the new method for coding transformation coefficients is characterized in particular by the following characteristic features: A two dimensional block of. Transformation coefficients are mapped to a one-dimensional vector by a scan.
  • Coefficient counter number of significant coefficients
  • RUN's number of non-significant coefficients in scan order
  • the levels are coded in reverse scan order.
  • FIG. 1 illustrates the basic principle of the coding of transformation coefficients according to the coding method according to the invention
  • FIG. 2 shows two examples of the coding of the significance
  • FIG. 1 illustrates the new coding method.
  • CBP4 CBP4
  • macroblock mode higher-level syntax elements
  • the CBP4 symbol is zero if there are no significant coefficients in the block.
  • a significance map is encoded that specifies the position (in scan order) of the significant transformation coefficients. The amounts and the signs of the significant coefficients are then transferred in reverse scan order.
  • point 1 describes the context modeling for the binary arithmetic coding.
  • the transformation coefficients of each block are mapped onto a vector using a scan process (for example a Zig-Zag scan).
  • CBP4 is a one-bit symbol that indicates whether there are significant transform coefficients (non-zero transform coefficients) in a block. If the CBP4 symbol is zero, no further information is transmitted for the corresponding block. 1.3 The significance figure
  • a significance map is encoded. This is done by transmitting a one-bit symbol (SIG) for each coefficient in scan order. If a corresponding significance symbol is one (significant coefficient), another one-bit symbol (LAST) is sent. This symbol indicates whether the current significant coefficient is the last significant coefficient within the block or if there are other significant coefficients to follow.
  • FIG. 2 shows two examples of the described method for coding the significance mapping. Significance information (SIG, LAST) is never transmitted for the last scan position of a block. Was the transfer of the significance mapping not already carried out by a LAST
  • the positions of the significant transformation coefficients within a block are clearly specified by the significance mapping.
  • the exact values of the coefficients (levels) are coded using two coding symbols: ABS (magnitude of the coefficients) and SIGN (sign of the coefficients). While SIGN represents a one-bit symbol, a binarization according to FIG. 3 is used to encode the amounts of the coefficients (ABS). For coefficient amounts in the interval [1; 14] this binarization corresponds to a unary binarization.
  • the binarization for coefficient amounts greater than 14 is composed of a prefix part consisting of 14 ones and a suffix part representing an 0th-order Exp-Golomb code for the symbol (ABS-15) ,
  • the binarization does not include a representation for Coefficient amounts (ABS) equal to 0, since significant coefficients (non-zero coefficients) always have an amount (ABS) greater than or equal to one.
  • the binarization composed of a prefix part and a suffix part consisting of a 0 th order Exp-Golomb code for coefficient amounts greater than 14 has the advantage that without loss of coding efficiency for all binary decisions of the suffix part A special non-adaptive context with the symbol probabilities 0.5 can be used, whereby the computational effort for the encoding and decoding can be reduced.
  • the levels are encoded in reverse scan order, beginning with the last significant coefficient within a block -; this allows the formation of suitable contexts for binary arithmetic coding.
  • C CBP4
  • a and B denoting those neighboring blocks (left and top) of the block C under consideration
  • Figure 5 can be assigned to the same block type.
  • the following 6 block types are distinguished for this conditioning: Luma-DC, Luma-AC, Chroma-U-DC, Chroma-U-AC, Chroma-V-DC, and Chroma- V AC.
  • CBP4 (X) is set to zero for the adjacent block X. If an adjacent block X (A or B) lies outside the image area or belongs to another slice, the corresponding value CBP4 (X) is replaced by a default value. A default value of one is used for INTRA-coded blocks and a default value of zero for INTER-coded blocks.
  • max_koeff-1 different contexts are used for the coding of the symbols SIG and LAST for each block category (see FIG. 4).
  • Max_koeff denotes the number of transformation coefficients for the corresponding block category (for H.264 / AVC, see Figure 4).
  • the context number is always identified by the corresponding scan Given the position of the considered coefficient.
  • 2xmax_koeff-2 contexts are used for coding the significance mapping.
  • the binarization shown in FIG. 3 is used for coding the amounts of the significant transformation coefficients.
  • the context numbers are assigned as follows: ctx_number_abs_lbin
  • the values of the transformation coefficients are transmitted in the reverse scan order.
  • the context number is determined by the number of already coded coefficients (in reverse scan order) with an amount ABS> 1, with a restriction to the maximum context number of 4 being made.
  • the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the arrangement and method according to the invention even in the case of fundamentally different types.
  • ITU-T Video coding for low bitrate communications
  • ISO / IEC JTC1 "Coding of audio-visual objects - Part 2: Visual”
  • ISO / IEC 14496-2 MPEG-4 visual Version.1
  • ISO / IEC 14496-2 MPEG-4 visual Version.1
  • ISO-IEC 14496-2 MPEG-4 visual Version.1
  • ISO-IEC 14496-2 MPEG-4 visual Version.1
  • CA. Gonzales "DCT coding of motion sequences including arithmetic coder", ISO-IEC / JTC1 / SC2 / WG8, MPEG 89/187, Aug. 1989.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Image Processing (AREA)
EP03725142A 2002-05-02 2003-05-02 Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur Withdrawn EP1500281A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04020471A EP1487113B1 (fr) 2002-05-02 2003-05-02 Codage et décodage de coefficients de transformation dans des codeurs d'images ou de vidéo
EP04016773A EP1467491B1 (fr) 2002-05-02 2003-05-02 Codage arithmétique des coefficients de transformée

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10220961 2002-05-02
DE10220961 2002-05-02
PCT/EP2003/004656 WO2003094529A2 (fr) 2002-05-02 2003-05-02 Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP04020471A Division EP1487113B1 (fr) 2002-05-02 2003-05-02 Codage et décodage de coefficients de transformation dans des codeurs d'images ou de vidéo
EP04016773A Division EP1467491B1 (fr) 2002-05-02 2003-05-02 Codage arithmétique des coefficients de transformée

Publications (1)

Publication Number Publication Date
EP1500281A2 true EP1500281A2 (fr) 2005-01-26

Family

ID=29285282

Family Applications (3)

Application Number Title Priority Date Filing Date
EP03725142A Withdrawn EP1500281A2 (fr) 2002-05-02 2003-05-02 Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur
EP04020471A Expired - Lifetime EP1487113B1 (fr) 2002-05-02 2003-05-02 Codage et décodage de coefficients de transformation dans des codeurs d'images ou de vidéo
EP04016773A Expired - Lifetime EP1467491B1 (fr) 2002-05-02 2003-05-02 Codage arithmétique des coefficients de transformée

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP04020471A Expired - Lifetime EP1487113B1 (fr) 2002-05-02 2003-05-02 Codage et décodage de coefficients de transformation dans des codeurs d'images ou de vidéo
EP04016773A Expired - Lifetime EP1467491B1 (fr) 2002-05-02 2003-05-02 Codage arithmétique des coefficients de transformée

Country Status (11)

Country Link
US (10) US7702013B2 (fr)
EP (3) EP1500281A2 (fr)
JP (4) JP4313757B2 (fr)
KR (1) KR100729270B1 (fr)
AT (2) ATE352826T1 (fr)
DE (2) DE50305419D1 (fr)
DK (2) DK1467491T3 (fr)
ES (2) ES2277174T3 (fr)
HK (2) HK1070480A1 (fr)
PT (2) PT1467491E (fr)
WO (1) WO2003094529A2 (fr)

Families Citing this family (112)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100993443B1 (ko) * 2001-11-22 2010-11-09 파나소닉 주식회사 복호화 방법
EP1500281A2 (fr) * 2002-05-02 2005-01-26 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur
US6744387B2 (en) * 2002-07-10 2004-06-01 Lsi Logic Corporation Method and system for symbol binarization
US8824553B2 (en) 2003-05-12 2014-09-02 Google Inc. Video compression method
US7646814B2 (en) * 2003-12-18 2010-01-12 Lsi Corporation Low complexity transcoding between videostreams using different entropy coding
US7660355B2 (en) * 2003-12-18 2010-02-09 Lsi Corporation Low complexity transcoding between video streams using different entropy coding
US20050259742A1 (en) * 2004-05-21 2005-11-24 Hellman Timothy M System and method for choosing tables in CAVLC
NO322043B1 (no) * 2004-12-30 2006-08-07 Tandberg Telecom As Fremgangsmate for forenklet entropikoding
KR100694098B1 (ko) 2005-04-04 2007-03-12 한국과학기술원 산술 복호 방법 및 그 장치
EP1768415A1 (fr) * 2005-09-27 2007-03-28 Matsushita Electric Industrial Co., Ltd. Ordonnancement adaptatif des coéfficients DCT et transmission dudit ordonnancement
KR100718134B1 (ko) 2005-07-21 2007-05-14 삼성전자주식회사 비트율에 적응적인 영상 데이터 이진 산술 부호화/복호화장치 및 방법
CN101313585A (zh) * 2005-10-03 2008-11-26 诺基亚公司 针对独立变量的自适应可变长度码
CN100466739C (zh) * 2005-10-12 2009-03-04 华为技术有限公司 Cabac解码系统及方法
US7778472B2 (en) 2006-03-27 2010-08-17 Qualcomm Incorporated Methods and systems for significance coefficient coding in video compression
US7262722B1 (en) * 2006-06-26 2007-08-28 Intel Corporation Hardware-based CABAC decoder with parallel binary arithmetic decoding
US8731064B2 (en) * 2006-09-11 2014-05-20 Apple Inc. Post-processing for decoder complexity scalability
EP2123052B1 (fr) * 2007-01-18 2010-11-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Flux de donnees video a qualite echelonnable
US8831086B2 (en) * 2008-04-10 2014-09-09 Qualcomm Incorporated Prediction techniques for interpolation in video coding
US9967590B2 (en) 2008-04-10 2018-05-08 Qualcomm Incorporated Rate-distortion defined interpolation for video coding based on fixed filter or adaptive filter
KR101511082B1 (ko) * 2008-05-09 2015-04-13 삼성전자주식회사 최하위 비트를 이용한 엔트로피 부호화 방법과 그 장치 및엔트로피 복호화 방법과 그 장치
US10123050B2 (en) 2008-07-11 2018-11-06 Qualcomm Incorporated Filtering video data using a plurality of filters
US8000546B2 (en) * 2008-08-01 2011-08-16 National Cheng Kung University Adaptive scan method for image/video coding
US8189776B2 (en) * 2008-09-18 2012-05-29 The Hong Kong University Of Science And Technology Method and system for encoding multimedia content based on secure coding schemes using stream cipher
WO2010041488A1 (fr) * 2008-10-10 2010-04-15 株式会社東芝 Dispositif de codage d'image dynamique
US9143803B2 (en) * 2009-01-15 2015-09-22 Qualcomm Incorporated Filter prediction based on activity metrics in video coding
JP5001964B2 (ja) * 2009-02-18 2012-08-15 株式会社エヌ・ティ・ティ・ドコモ 画像符号化装置、方法およびプログラム、並びに、画像復号装置、方法およびプログラム
US8677406B2 (en) * 2009-03-27 2014-03-18 Samsung Electronics Co., Ltd Time-shift recording buffer as home network objects
JP5258664B2 (ja) 2009-04-14 2013-08-07 株式会社エヌ・ティ・ティ・ドコモ 画像符号化装置、方法およびプログラム、並びに、画像復号装置、方法およびプログラム
CN102421402B (zh) * 2009-05-12 2014-09-03 Sca卫生用品公司 具有经连接构件连接至侧部的阻挡件的一次性吸收性物品
KR101624649B1 (ko) * 2009-08-14 2016-05-26 삼성전자주식회사 계층적인 부호화 블록 패턴 정보를 이용한 비디오 부호화 방법 및 장치, 비디오 복호화 방법 및 장치
EP2315358A1 (fr) * 2009-10-09 2011-04-27 Thomson Licensing Procédé et dispositif pour le codage ou le décodage arithmétique
KR101411780B1 (ko) 2009-10-20 2014-06-24 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 이전의 디코딩된 스펙트럼 값들의 그룹의 검출을 이용하는 오디오 인코더, 오디오 디코더, 오디오 정보를 인코딩하기 위한 방법, 오디오 정보를 디코딩하기 위한 방법 및 컴퓨터 프로그램
KR101457894B1 (ko) * 2009-10-28 2014-11-05 삼성전자주식회사 영상 부호화 방법 및 장치, 복호화 방법 및 장치
JP5773502B2 (ja) 2010-01-12 2015-09-02 フラウンホーファーゲゼルシャフトツール フォルデルング デル アンゲヴァンテン フォルシユング エー．フアー． オーディオ符号化器、オーディオ復号器、オーディオ情報を符号化するための方法、オーディオ情報を復号するための方法、および上位状態値と間隔境界との両方を示すハッシュテーブルを用いたコンピュータプログラム
HUE037656T2 (hu) * 2010-04-13 2018-09-28 Fraunhofer Ges Forschung Valószínûség intervallum partícionáló kódoló és dekódoló
HUE040296T2 (hu) 2010-04-13 2019-02-28 Ge Video Compression Llc Szignifikancia térképek és transzformációs együttható blokkok kódolása
KR20230129624A (ko) * 2010-05-12 2023-09-08 인터디지털 매디슨 페턴트 홀딩스 에스에이에스 통합된 유효성 맵 코딩을 위한 방법 및 장치
US10091529B2 (en) 2010-07-09 2018-10-02 Samsung Electronics Co., Ltd. Method and apparatus for entropy encoding/decoding a transform coefficient
PL2592832T3 (pl) 2010-07-09 2016-12-30 Sposób i urządzenie do kodowania/dekodowania entropijnego współczynnika przekształcenia
US9661338B2 (en) 2010-07-09 2017-05-23 Qualcomm Incorporated Coding syntax elements for adaptive scans of transform coefficients for video coding
US8483500B2 (en) 2010-09-02 2013-07-09 Sony Corporation Run length coding with context model for image compression using sparse dictionaries
US9154801B2 (en) * 2010-09-30 2015-10-06 Texas Instruments Incorporated Method and apparatus for diagonal scan and simplified coding of transform coefficients
CA2810899C (fr) 2010-10-05 2016-08-09 General Instrument Corporation Codage et decodage employant une selection adaptative de modeles de contexte avec balayage en zigzag
US9042440B2 (en) 2010-12-03 2015-05-26 Qualcomm Incorporated Coding the position of a last significant coefficient within a video block based on a scanning order for the block in video coding
US8976861B2 (en) 2010-12-03 2015-03-10 Qualcomm Incorporated Separately coding the position of a last significant coefficient of a video block in video coding
US20120163456A1 (en) 2010-12-22 2012-06-28 Qualcomm Incorporated Using a most probable scanning order to efficiently code scanning order information for a video block in video coding
US20120163457A1 (en) * 2010-12-28 2012-06-28 Viktor Wahadaniah Moving picture decoding method, moving picture coding method, moving picture decoding apparatus, moving picture coding apparatus, and moving picture coding and decoding apparatus
US10992958B2 (en) 2010-12-29 2021-04-27 Qualcomm Incorporated Video coding using mapped transforms and scanning modes
US9490839B2 (en) 2011-01-03 2016-11-08 Qualcomm Incorporated Variable length coding of video block coefficients
KR101888218B1 (ko) * 2011-01-19 2018-08-13 선 페이턴트 트러스트 화상 부호화 방법, 화상 복호 방법, 화상 부호화 장치, 화상 복호 장치, 및 화상 부호화 복호 장치
US20120207400A1 (en) * 2011-02-10 2012-08-16 Hisao Sasai Image coding method, image coding apparatus, image decoding method, image decoding apparatus, and image coding and decoding apparatus
US8989261B2 (en) 2011-02-23 2015-03-24 Qualcomm Incorporated Multi-metric filtering
US9106913B2 (en) 2011-03-08 2015-08-11 Qualcomm Incorporated Coding of transform coefficients for video coding
US20120230418A1 (en) 2011-03-08 2012-09-13 Qualcomm Incorporated Coding of transform coefficients for video coding
US20120230396A1 (en) * 2011-03-11 2012-09-13 Mitsubishi Electric Research Laboratories, Inc. Method for Embedding Decoding Information in Quantized Transform Coefficients
US8938001B1 (en) 2011-04-05 2015-01-20 Google Inc. Apparatus and method for coding using combinations
US8446301B2 (en) 2011-04-15 2013-05-21 Research In Motion Limited Methods and devices for coding and decoding the position of the last significant coefficient
CN103597838B (zh) * 2011-04-15 2017-03-29 黑莓有限公司 对末位有效系数的位置进行编码和解码的方法和设备
CN107517384B (zh) 2011-06-16 2020-06-30 Ge视频压缩有限责任公司 解码器、编码器、解码方法、编码方法以及存储介质
CA2837532C (fr) 2011-06-23 2018-10-02 Panasonic Corporation Procede de decodage d'image, procede de codage d'image, dispositif de codage d'image, dispositif de decodage d'image et dispositif de codage/decodage d'image
USRE47366E1 (en) 2011-06-23 2019-04-23 Sun Patent Trust Image decoding method and apparatus based on a signal type of the control parameter of the current block
KR102062283B1 (ko) * 2011-06-24 2020-01-03 선 페이턴트 트러스트 화상 복호 방법, 화상 부호화 방법, 화상 복호 장치, 화상 부호화 장치 및 화상 부호화 복호 장치
CA2830046C (fr) 2011-06-24 2018-09-04 Panasonic Corporation Procede de decodage d'image, procede de codage d'image, dispositif de decodage d'image, dispositif de codage d'image et dispositif de codage/decodage d'image
CN103563375B (zh) 2011-06-27 2017-04-05 太阳专利托管公司 图像解码方法、图像编码方法、图像解码装置、图像编码装置及图像编码解码装置
PT2728866T (pt) * 2011-06-28 2019-02-21 Samsung Electronics Co Ltd Método e aparelho para codificar vídeo e método e aparelho para descodificar vídeo acompanhado com codificação aritmética
CA2837535C (fr) 2011-06-28 2018-09-04 Panasonic Corporation Procede de decodage d'image, procede de codage d'image, dispositif de decodage d'image, dispositif de codage d'image et dispositif de codage/decodage d'image
US9491469B2 (en) 2011-06-28 2016-11-08 Qualcomm Incorporated Coding of last significant transform coefficient
MX2013010892A (es) 2011-06-29 2013-12-06 Panasonic Corp Metodo de decodificacion de imagenes, metodo de codificacion de imagenes, aparato de decodificacion de imagenes, aparato de codificacion de imagenes y aparato de codificacion y decodificacion de imagenes.
US20130083856A1 (en) * 2011-06-29 2013-04-04 Qualcomm Incorporated Contexts for coefficient level coding in video compression
US9516316B2 (en) 2011-06-29 2016-12-06 Qualcomm Incorporated VLC coefficient coding for large chroma block
AU2012277219A1 (en) 2011-06-30 2013-09-19 Sun Patent Trust Image decoding method, image encoding method, image decoding device, image encoding device, and image encoding/decoding device
CN103583048B (zh) 2011-06-30 2017-05-17 太阳专利托管公司 图像解码方法、图像编码方法、图像解码装置、图像编码装置及图像编码解码装置
US9392301B2 (en) * 2011-07-01 2016-07-12 Qualcomm Incorporated Context adaptive entropy coding for non-square blocks in video coding
KR20140034209A (ko) 2011-07-11 2014-03-19 파나소닉 주식회사 화상 복호 방법, 화상 부호화 방법, 화상 복호 장치, 화상 부호화 장치 및 화상 부호화 복호 장치
US9338456B2 (en) 2011-07-11 2016-05-10 Qualcomm Incorporated Coding syntax elements using VLC codewords
UA114674C2 (uk) 2011-07-15 2017-07-10 ДЖ.І. ВІДІЕУ КЕМПРЕШН, ЛЛСі Ініціалізація контексту в ентропійному кодуванні
US8891616B1 (en) 2011-07-27 2014-11-18 Google Inc. Method and apparatus for entropy encoding based on encoding cost
JP2013074528A (ja) * 2011-09-28 2013-04-22 Sony Corp 画像処理装置と画像処理方法
LT3145197T (lt) 2011-10-31 2018-08-27 Samsung Electronics Co., Ltd. Transformacijos koeficiento lygmens entropinio dekodavimo konteksto modelio nustatymo būdas
CN107197284B (zh) * 2011-11-07 2020-03-27 太阳专利托管公司 图像编码解码装置
US9154792B2 (en) 2011-11-08 2015-10-06 Qualcomm Incorporated Progressive coding of position of last significant coefficient
US9357185B2 (en) 2011-11-08 2016-05-31 Qualcomm Incorporated Context optimization for last significant coefficient position coding
JP2014533058A (ja) * 2011-11-08 2014-12-08 サムスン エレクトロニクス カンパニー リミテッド ビデオの算術符号化方法及びその装置、並びにビデオの算術復号化方法及びその装置
TWI580264B (zh) * 2011-11-10 2017-04-21 Sony Corp Image processing apparatus and method
CN104041032B (zh) * 2012-01-12 2017-10-24 寰发股份有限公司 统一显著性位图上下文选择的方法及装置
CN111683255B (zh) * 2012-01-20 2022-08-02 索尼公司 有效度图编码的复杂度降低
US11039138B1 (en) 2012-03-08 2021-06-15 Google Llc Adaptive coding of prediction modes using probability distributions
US10129540B2 (en) 2012-04-10 2018-11-13 Texas Instruments Incorporated Reduced complexity coefficient transmission for adaptive loop filtering (ALF) in video coding
US9774856B1 (en) 2012-07-02 2017-09-26 Google Inc. Adaptive stochastic entropy coding
US9509998B1 (en) 2013-04-04 2016-11-29 Google Inc. Conditional predictive multi-symbol run-length coding
WO2015054812A1 (fr) 2013-10-14 2015-04-23 Microsoft Technology Licensing, Llc Fonctions de mode carte d'index de couleur de base pour codage et décodage de vidéo et d'image
US9392288B2 (en) 2013-10-17 2016-07-12 Google Inc. Video coding using scatter-based scan tables
US9179151B2 (en) 2013-10-18 2015-11-03 Google Inc. Spatial proximity context entropy coding
US10542274B2 (en) 2014-02-21 2020-01-21 Microsoft Technology Licensing, Llc Dictionary encoding and decoding of screen content
KR102330740B1 (ko) 2014-09-30 2021-11-23 마이크로소프트 테크놀로지 라이센싱, 엘엘씨 파면 병렬 프로세싱이 인에이블되는 경우의 인트라 픽쳐 예측 모드에 대한 규칙
US10306229B2 (en) 2015-01-26 2019-05-28 Qualcomm Incorporated Enhanced multiple transforms for prediction residual
US10659783B2 (en) * 2015-06-09 2020-05-19 Microsoft Technology Licensing, Llc Robust encoding/decoding of escape-coded pixels in palette mode
US10171810B2 (en) 2015-06-22 2019-01-01 Cisco Technology, Inc. Transform coefficient coding using level-mode and run-mode
US10623774B2 (en) 2016-03-22 2020-04-14 Qualcomm Incorporated Constrained block-level optimization and signaling for video coding tools
EP3447973B1 (fr) * 2016-05-10 2021-04-07 Huawei Technologies Co., Ltd. Procédé et terminal de reconnaissance de service de commutation de paquets
US10244261B2 (en) * 2017-01-26 2019-03-26 Google Llc Transform coefficient coding using level maps
US10523968B2 (en) 2017-09-18 2019-12-31 Google Llc Coding of last significant coefficient flags
US10484695B2 (en) 2017-10-23 2019-11-19 Google Llc Refined entropy coding for level maps
KR102527184B1 (ko) 2018-03-29 2023-05-03 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 변환 계수 블록 코딩
US10645381B2 (en) 2018-04-30 2020-05-05 Google Llc Intra-prediction for smooth blocks in image/video
BR112021005558A2 (pt) * 2018-09-24 2021-06-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. aparelho para codificar e decodificar um bloco de coeficientes de transformação, codificador para codificar e decodificador para decodificar um bloco de coeficiente de transformação, método para codificar e decodificar um bloco de coeficientes de transformação, corrente de dados
US11323748B2 (en) 2018-12-19 2022-05-03 Qualcomm Incorporated Tree-based transform unit (TU) partition for video coding
CN113316934B (zh) * 2019-01-25 2024-03-08 寰发股份有限公司 带有变换块级别约束的变换系数编码的方法和设备
US11523136B2 (en) 2019-01-28 2022-12-06 Hfi Innovation Inc. Methods and apparatuses for coding transform blocks
US10728555B1 (en) * 2019-02-06 2020-07-28 Sony Corporation Embedded codec (EBC) circuitry for position dependent entropy coding of residual level data
CN111246211B (zh) * 2020-02-04 2021-11-16 中国联合网络通信集团有限公司 编码方法、解码方法、装置、设备及存储介质
EP4088449A4 (fr) 2020-04-20 2023-07-05 Lumus Ltd. Affichage proche de l'?il présentant un rendement laser amélioré et une sécurité oculaire améliorée

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6546145B1 (en) * 1991-02-05 2003-04-08 Canon Kabushiki Kaisha Image compression using selection of quantization method
US5253055A (en) 1992-07-02 1993-10-12 At&T Bell Laboratories Efficient frequency scalable video encoding with coefficient selection
US5576765A (en) * 1994-03-17 1996-11-19 International Business Machines, Corporation Video decoder
CA2144253C (fr) * 1994-04-01 1999-09-21 Bruce F. Naylor Systeme et methode de generation d'images video comprimees
US5473376A (en) * 1994-12-01 1995-12-05 Motorola, Inc. Method and apparatus for adaptive entropy encoding/decoding of quantized transform coefficients in a video compression system
US5680129A (en) * 1995-07-18 1997-10-21 Hewlett-Packard Company System and method for lossless image compression
US6483946B1 (en) * 1995-10-25 2002-11-19 Sarnoff Corporation Apparatus and method for encoding zerotrees generated by a wavelet-based coding technique
US5818877A (en) * 1996-03-14 1998-10-06 The Regents Of The University Of California Method for reducing storage requirements for grouped data values
US6304607B1 (en) * 1997-03-18 2001-10-16 Texas Instruments Incorporated Error resilient video coding using reversible variable length codes (RVLCS)
US6466698B1 (en) * 1999-03-25 2002-10-15 The United States Of America As Represented By The Secretary Of The Navy Efficient embedded image and video compression system using lifted wavelets
FR2800942A1 (fr) * 1999-11-09 2001-05-11 France Telecom Procede de decodage de donnees codees a l'aide d'un code entropique, dispositif de decodage et systeme de transmission correspondants
AUPQ668500A0 (en) * 2000-04-04 2000-05-04 Canon Kabushiki Kaisha Accessing items of information
US6819803B2 (en) * 2001-07-02 2004-11-16 International Business Machines Corporation Faster lossless rotation of JPEG images
US6856701B2 (en) * 2001-09-14 2005-02-15 Nokia Corporation Method and system for context-based adaptive binary arithmetic coding
US7190840B2 (en) * 2002-01-07 2007-03-13 Hewlett-Packard Development Company, L.P. Transform coefficient compression using multiple scans
EP2202989B1 (fr) * 2002-04-26 2014-04-16 NTT DoCoMo, Inc. Bildcodierungsvorrichtung, Bilddecodierungsvorrichtung, Bildcodierungsverfahren, Bilddecodierungsverfahren, Bildcodierungsprogramm und Bilddecodierungsprogramm
EP1500281A2 (fr) * 2002-05-02 2005-01-26 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procede et ensemble pour coder des coefficients de transformation dans des codeurs d'image et/ou video et des decodeurs d'image et/ou video, programme informatique correspondant et support de memorisation correspondant lisible sur ordinateur
US6744387B2 (en) * 2002-07-10 2004-06-01 Lsi Logic Corporation Method and system for symbol binarization
US6900748B2 (en) * 2003-07-17 2005-05-31 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Method and apparatus for binarization and arithmetic coding of a data value
US7369709B2 (en) * 2003-09-07 2008-05-06 Microsoft Corporation Conditional lapped transform

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03094529A2 *

Also Published As

Publication number Publication date
US9490838B2 (en) 2016-11-08
US20160277742A1 (en) 2016-09-22
PT1487113E (pt) 2006-12-29
EP1467491A2 (fr) 2004-10-13
ES2277174T3 (es) 2007-07-01
US7702013B2 (en) 2010-04-20
EP1487113A3 (fr) 2005-03-16
EP1487113B1 (fr) 2006-10-18
US20160277764A1 (en) 2016-09-22
US9490837B2 (en) 2016-11-08
DK1467491T3 (da) 2007-03-19
EP1467491A3 (fr) 2005-03-02
DE50305419D1 (de) 2006-11-30
DE50306371D1 (de) 2007-03-15
JP2005229632A (ja) 2005-08-25
JP4295356B1 (ja) 2009-07-15
JP4313771B2 (ja) 2009-08-12
JP2005237004A (ja) 2005-09-02
US20160277765A1 (en) 2016-09-22
ATE343302T1 (de) 2006-11-15
JP2009165144A (ja) 2009-07-23
DK1487113T3 (da) 2006-11-20
US20050117652A1 (en) 2005-06-02
HK1070992A1 (en) 2005-06-30
US9698820B2 (en) 2017-07-04
ATE352826T1 (de) 2007-02-15
KR20040106351A (ko) 2004-12-17
US9450608B2 (en) 2016-09-20
US20090201995A1 (en) 2009-08-13
US9698822B2 (en) 2017-07-04
US7496143B2 (en) 2009-02-24
US20160277763A1 (en) 2016-09-22
WO2003094529A2 (fr) 2003-11-13
US20040114683A1 (en) 2004-06-17
JP4057595B2 (ja) 2008-03-05
US9362949B2 (en) 2016-06-07
US20090201986A1 (en) 2009-08-13
US20090201994A1 (en) 2009-08-13
HK1070480A1 (en) 2005-06-17
ES2270246T3 (es) 2007-04-01
WO2003094529A3 (fr) 2004-04-08
EP1467491B1 (fr) 2007-01-24
PT1467491E (pt) 2007-03-30
KR100729270B1 (ko) 2007-06-15
US9698821B2 (en) 2017-07-04
US9698823B2 (en) 2017-07-04
US20090201996A1 (en) 2009-08-13
JP2005530375A (ja) 2005-10-06
JP4313757B2 (ja) 2009-08-12
EP1487113A2 (fr) 2004-12-15

Similar Documents

Publication Publication Date Title
EP1467491B1 (fr) Codage arithmétique des coefficients de transformée
EP2489187B1 (fr) Procédé de codage de symboles à partir d'une séquence d'images numérisées
EP0290085B1 (fr) Système pour la transmission d'images vidéo
DE19506164C2 (de) Verfahren zum Komprimieren eingegebener Symbole in Codeworte
DE69637067T2 (de) System zur variablen Längendekodierung
EP0260748B1 (fr) Procédé et circuit de réduction du débit de bits
DE69833094T2 (de) Verfahren und Vorrichtung zur adaptiven Datenkompression mit höherem Kompressionsgrad
EP2068448B1 (fr) Procédé et agencement d'encodage et de décodage arithmétiques avec utilisation de plusieurs tableaux
DE602004001993T2 (de) Transformations basiertes restbewegungsrahmen kodierungsverfahren mit übervollständiger basis und zugehörige vorrichtung zur videokompression
DE10204617B4 (de) Verfahren und Vorrichtungen zur Kompression und Dekompression eines Videodatenstroms
DE60015755T2 (de) Verlustfreie adaptive codierung von daten eines endlichen alphabets
EP1323313B1 (fr) Procede et dispositif pour transmettre un vecteur
EP1425920B1 (fr) Procede de codage video et produit-programme informatique
DE60200377T2 (de) Datenkompression
DE19653133C2 (de) System und Verfahren zur pre-entropischen Codierung
DE19549491C2 (de) Entropie-Codierer
EP1304885A2 (fr) Méthode et programme d'ordinateur pour le codage et le décodage de signaux vidéo
EP0525349B1 (fr) Dispositif pour codage réduisant la redondance
WO2003026308A2 (fr) Procede et dispositif pour ameliorer le codage/decodage de signaux video
Lam Image compression
DE3744280A1 (de) System zur uebertragung von videobildern
DE10224996A1 (de) Verfahren zur Codierung und Decodierung von Videosignalen und Computerprogrammprodukt
DE10143062A1 (de) Verfahren und Vorrichtung zur Codierung oder Codierung und Übertragung digitaler Videoinformationen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040630

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1069050

Country of ref document: HK

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20060711

REG Reference to a national code

Ref country code: HK

Ref legal event code: WD

Ref document number: 1069050

Country of ref document: HK